There are two very good online resources for Shaker furniture that most folks do not seem to be aware of.
Hancock Shaker Village has their entire collection cataloged in a searchable database with photos, overall dimensions and what time frame the pieces date to. You can check it out here.
Shaker Museum Mount Lebanon also has their collection available online, 1000’s of wonderful photos. It can be viewed here.
These are both extensive, the two together total more than 40,000 objects. You can spend hours lost in them. You have been warned!